usr/src/cmd/mdb/common/kmdb/kctl/kctl_auxv.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <kmdb/kctl/kctl.h>
  29
  30 #include <sys/modctl.h>
  31 #include <sys/bootconf.h>
  32 #include <sys/kobj.h>
  33 #include <sys/kobj_impl.h>
  34 #include <sys/kmdb.h>
  35
  36 static uintptr_t
  37 kctl_lookup_by_name(char *modname, char *symname)
  38 {
  39         struct modctl *mctl;
  40         Sym *ksym;
  41         uintptr_t addr;
  42
  43         if ((mctl = mod_hold_by_name(modname)) == NULL)
  44                 return (0);
  45         if ((ksym = kobj_lookup_all(mctl->mod_mp, symname, 1)) == NULL) {
  46                 mod_release_mod(mctl);
  47                 return (0);
  48         }
  49
  50         addr = ksym->st_value;
  51
  52         mod_release_mod(mctl);
  53
  54         return (addr);
  55 }
  56
  57 static uintptr_t
  58 kctl_boot_lookup_by_name(char *modname, char *symname)
  59 {
  60         struct modctl *mctl;
  61         Sym *ksym;
  62
  63         if ((mctl = kobj_boot_mod_lookup(modname)) == NULL)
  64                 return (0);
  65
  66         if ((ksym = kobj_lookup_all(mctl->mod_mp, symname, 1)) == NULL)
  67                 return (0);
  68
  69         return (ksym->st_value);
  70 }
  71
  72 void
  73 kctl_auxv_init(kmdb_auxv_t *kav, const char *cfg, const char **argv, void *romp)
  74 {
  75         bzero(kav, sizeof (kmdb_auxv_t));
  76         kav->kav_dseg = kctl.kctl_dseg;
  77         kav->kav_dseg_size = kctl.kctl_dseg_size;
  78         kav->kav_pagesize = PAGESIZE;
  79         kav->kav_ncpu = NCPU;
  80         kav->kav_kdi = &kobj_kdi;
  81         kav->kav_wrintr_fire = kctl_wrintr_fire;
  82
  83         kav->kav_config = cfg;
  84         kav->kav_argv = argv;
  85         kav->kav_modpath = kobj_module_path;
  86
  87         kctl_dprintf("kctl_auxv_init: modpath '%s'", kav->kav_modpath);
  88
  89         if (kctl.kctl_boot_loaded) {
  90                 kav->kav_lookup_by_name = kctl_boot_lookup_by_name;
  91                 kav->kav_flags |= KMDB_AUXV_FL_NOUNLOAD;
  92         } else
  93                 kav->kav_lookup_by_name = kctl_lookup_by_name;
  94
  95         if (kctl.kctl_flags & KMDB_F_TRAP_NOSWITCH)
  96                 kav->kav_flags |= KMDB_AUXV_FL_NOTRPSWTCH;
  97
  98         kctl_auxv_init_isadep(kav, romp); /* can modify anything in kav */
  99 }
 100
 101 void
 102 kctl_auxv_fini(kmdb_auxv_t *kav)
 103 {
 104         kctl_auxv_fini_isadep(kav);
 105 }